scrolling is acceptable. The reason being Dashboard's are nothing but distilled set of information which are also known as Key Performance Indicators (KPI's). Now you place your KPI's on your dashboard in the order that is being most used and important.
Should dashboards be scrollable?
Not necessarily — As long as you do it right. It is always better to allow scrolling than to have an overloaded dashboard without it. Scrolling is an action that most users are familiar with (think about Facebook or Instagram for instance — scrolling is in their interface core).
Is scrolling good UX?
With the average end user spending 69% of their media time on smartphones, attention to mobile UX features is a top priority. Scrolling is a vital part of this user experience, and it's one that's frequently underrated. Scrolling is how people will find your content.
Can Tableau dashboards scroll?
Tableau Desktop automatically adds a vertical scroll bar when the height of the dashboard is larger than the screen it is being shown on.